Real estate acquisition services; Real estate agency services; Real estate brokerage; Real estate listing; Real estate listing services for housing rentals and apartment rentals; Real estate multiple listing services; Real estate services in the form of providing physical access to available properties via a remote call-in locking device; Arranging of leases and rental agreements for real estate; Classified real estate listings of apartment rentals and housing rentals; Commercial and residential real estate agency services; Leasing of real estate; Providing real estate listings and real estate information via the Internet; Providing real estate listings via the Internet; Providing a database of information about residential real estate listings in different neighborhoods and communities; Providing a database of residential real estate listings within neighborhoods and communities specifically identified by users; Providing an Internet website portal offering information in the fields of real estate concerning the purchase and sale of new and resale homes and condos; Providing information in the field of real estate via the Internet; Residential real estate agency services